Modeling the Environmental Hazards of El-Kharga Oasis Sand Dunes, Western Desert of Egypt, using Remote Sensing and GIS Techniques

2021 ◽  
Vol 10 (1) ◽  
pp. 3501-3520
Author(s):  
Hanaa A. Megahed ◽  
◽  
Awad Hassoup ◽  
Abd El-Hay A. Farrag ◽  
Doaa Wahba ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Risk Assessment ◽  
Thermal Emission ◽  
Sand Dunes ◽  
Environmental Hazards ◽  
Assessment Model ◽  
Western Desert ◽  
Agricultural Fields ◽  
Gis Techniques ◽  
Kharga Oasis

In this study, an integrated suite of Remote Sensing (RS) data and Geographic Information System (GIS) techniques supported by fieldwork is used to assess the sand dunes movement hazards at El-Kharga Oasis. Digital Elevation Model (DEM) data obtained from the Shuttle Radar Topography Mission (SRTM) and Advanced Spaceborne Thermal Emission and Reflection (ASTER) were integrated with GIS techniques to model the vulnerable locations and to study the terrain characteristics (slope angles and aspects) in the studied area. The risk assessment model output was verified with the field investigations using multi-temporal satellite images recorded between 1990 and 2019. Monthly wind roses showed that the sand drifts in the southeastern direction differed widely from one direction to another depending on the wind direction and velocity. The most important output of the spatial model’s, results was a geo-hazard map that classified the sand dunes hazard zones into low, slight, moderate, and high-risk zones. It is concluded that, the sand dunes pose a serious hazard because of their fast movement and accumulation near the monumental sites, over roads and invading the agricultural fields. The obtained results can serve as a basis for planners and decision-makers to take the necessary precautions and measures to minimize the sand dune hazard’s impact on the monumental sites (e.g., Hibis, El-Nadura, El-Ghueita and El-Zayyan), roads, and the agricultural fields at El-Kharga Oasis and lead to a sustainable development plan. Keywords Environmental Hazards; Sand Dunes Movement; Remote Sensing; Risk Assessment, Egypt

Risk Assessment of Field-Scale Flood Disaster Based on Combined Remote Sensing and Hydrological Dynamics Model

2012 ◽  
Vol 166-169 ◽  
pp. 2810-2813
Author(s):  
Jing Zhang ◽  
Guo Bin Ma
Keyword(s):  
Remote Sensing ◽  
Risk Assessment ◽  
Regional Scale ◽  
Critical Issue ◽  
Flood Disaster ◽  
Assessment Model ◽  
Accurate Information ◽  
Field Scale ◽  
Dynamics Model ◽  
Local Conditions

There is an increasing need for more accurate information on the hazard and risk of flooding in local region. Besides the national-scale and regional-scale flood risk assessments, it is gradually developed with a focus on particular field-scale conditions in order to ensure that local conditions are taken into account in. On this basis, how to efficiently and effectively make use of the remote sensing monitoring products embedded with hydrological dynamics model is the critical issue for the field-scale flood disaster risk assessment. In this research, based on the established GIS database, it proposed a new combined assessment model, which integrating remote sensing products and SCS hydrological dynamics model to generate the weighted water level of inundated area for assessing the field-scale flood disaster in Hubei province. The major research methods and key technologies involved were discussed briefly. The example result reveals that combined remote sensing and hydrological dynamics field-scale risk assessment model conforms basically to the actual disaster data.

scholarly journals Forest fire risk assessment model using Remote sensing and GIS techniques in Tujiin nars national park, Mongolia

2021 ◽  
pp. 10-19
Author(s):  
Munkh-Erdene Altangerel ◽  
Amarsaikhan Damdinsuren ◽  
Jargaldalai Enkhtuya ◽  
Nyamjargal Erdenebaatar
Keyword(s):  
Remote Sensing ◽  
Risk Assessment ◽  
Forest Fire ◽  
National Park ◽  
Fire Risk ◽  
Assessment Model ◽  
Research Approach ◽  
Main Concern ◽  
Fire Risk Assessment ◽  
Forest Fire Risk

Forest is an important natural resource that should be carefully protected and rationally managed. In recent years, deforestation and forest land degradation have become the main concern for forest specialists as well as policy and decision-makers dealing with environment issues. It has been found that much of the existing forests have been destroyed, mainly by shifting cultivation, timber preparation, legal and illegal logging, and forest fires. To protect and conserve the deteriorating forest, it is very important to conduct forest-related risk assessment and map the outcomes in a spatial domain. The aim of this research is to conduct a forest fire risk assessment mapping of Tujiin Nars National Park using geographic information system (GIS) and remote sensing (RS) techniques. The research approach is based on an empirical model. It includes three parameters (i.e. geomorphology, vegetation cover combustibility and human activity) that are crucial for the forest fire assessment. The results of the study can be used for different decision making processes.

scholarly journals Natural and human hazard assessment of the archaeological sites of Paphos area (Cyprus) with the use of remote sensing and GIS.

2016 ◽  
Vol 47 (3) ◽  
pp. 1448
Author(s):  
D. D. Alexakis ◽  
A. Agapiou ◽  
K. Themistocleous ◽  
V. Lysandrou ◽  
A. Sarris ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Risk Assessment ◽  
Cultural Heritage ◽  
Remote Sensing And Gis ◽  
Assessment Model ◽  
Archaeological Sites ◽  
Integrated Monitoring ◽  
Vast Number ◽  
Environmental Threats ◽  
Heritage Sites

The study focuses on the creation of an innovative methodology for the development of a risk assessment model for the archaeological sites of western Cyprus (Paphos district). On site observation is the most common way for monitoring cultural heritage sites and monuments in Cyprus. However, this procedure which includes data collection,  periodical  observations,  and  multivariate  risk  assessment  analysis,  is practically difficult to be accomplished with the traditional practices and methods since it is time consuming and cost insufficient. Thus, the use of modern technologies such as Remote Sensing and GIS is anticipated to provide a tool of directives for the protection and preservation of cultural heritage sites from anthropogenic and environmental threats. These technologies provide  to scientists integrated monitoring capabilities and have the unique advantage to store and manipulate a large amount of spatial and attribute data simultaneously. This study aims to integrate both satellite remote sensing techniques and GIS in a multidisciplinary approach, for monitoring natural and anthropogenic hazards with the use of archived and up-to-dated multi-temporal remotely sensed images in the study area, namely in areas nearby cultural heritage sites and monuments in Paphos area (Cyprus).According to the results, extensive construction and building development has taken placein the broader area. It was also proved that vast number of sites is established on areas prone to erosion and landslide phenomena.

Drought risk assessment using remote sensing and GIS techniques

2012 ◽  
Vol 7 (1) ◽  
pp. 35-53 ◽  
Author(s):  
Abdel-Aziz Belal ◽  
Hassan R. El-Ramady ◽  
Elsayed S. Mohamed ◽  
Ahmed M. Saleh
Keyword(s):  
Remote Sensing ◽  
Risk Assessment ◽  
Remote Sensing And Gis ◽  
Drought Risk ◽  
Gis Techniques

scholarly journals Forest Fire Risk Assessment Model Using Remote Sensing and GIS Techniques in Northwest Algeria

2019 ◽  
Vol 15 (1) ◽  
pp. 9-21
Author(s):  
Abdelkader Benguerai ◽  
Khéloufi Benabdeli ◽  
Abdelkader Harizia
Keyword(s):  
Remote Sensing ◽  
Risk Assessment ◽  
Forest Fire ◽  
Fire Hazard ◽  
Fire Risk ◽  
Local Economy ◽  
Assessment Model ◽  
Fire Risk Assessment ◽  
Forest Fire Prevention ◽  
In Fire

Abstract Algeria loses more than 20,000 hectares of forest to fire every year. The losses are costly both in terms of life and property damage, which weighs heavily on the environment and the local economy. Geomatics can complement the conventional methods used in fire hazard prevention and management. The objective of our study is to use the geographic information system (GIS) and the Remote Sensing (RS) technology to develop the fire risk assessment map of the forest massif of Zelamta located in Southeast Mascara province (Northwest Algeria). The methodology employed was an empirical model involving three parameters that can control fire behaviour: geomorphology, vegetal cover combustibility, and human activity. The obtained results can help in the decision-making process as well as provide cartographic support for forest fire prevention and management.

Risk assessment model for venous thromboembolism in hospitalized surgical and non-surgical patients in the 4th Hungarian Antithrombotic Guidelines entitled “Diminution and Treatment of Venous Thromboembolism”

2010 ◽  
Vol 151 (34) ◽  
pp. 1365-1374 ◽  
Author(s):  
Marianna Dávid ◽  
Hajna Losonczy ◽  
Miklós Udvardy ◽  
Zoltán Boda ◽  
György Blaskó ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Venous Thromboembolism ◽  
Assessment Model ◽  
Surgical Patients ◽  
Risk Assessment Model

A kórházban kezelt sebészeti és belgyógyászati betegekben jelentős a vénásthromboembolia-rizikó. Profilaxis nélkül, a műtét típusától függően, a sebészeti beavatkozások kapcsán a betegek 15–60%-ában alakul ki mélyvénás trombózis vagy tüdőembólia, és az utóbbi ma is vezető kórházi halálok. Bár a vénás thromboemboliát leggyakrabban a közelmúltban végzett műtéttel vagy traumával hozzák kapcsolatba, a szimptómás thromboemboliás események 50–70%-a és a fatális tüdőembóliák 70–80%-a nem a sebészeti betegekben alakul ki. Nemzetközi és hazai felmérések alapján a nagy kockázattal rendelkező sebészeti betegek többsége megkapja a szükséges trombózisprofilaxist. Azonban profilaxis nélkül marad a rizikóval rendelkező belgyógyászati betegek jelentős része, a konszenzuson alapuló nemzetközi és hazai irányelvi ajánlások ellenére. A belgyógyászati betegek körében növelni kell a profilaxisban részesülők arányát és el kell érni, hogy trombózisrizikó esetén a betegek megkapják a hatásos megelőzést. A beteg trombóziskockázatának felmérése fontos eszköze a vénás thromboembolia által veszélyeztetett betegek felderítésének, megkönnyíti a döntést a profilaxis elrendeléséről és javítja az irányelvi ajánlások betartását. A trombózisveszély megállapításakor, ha nem ellenjavallt, profilaxist kell alkalmazni. „A thromboemboliák kockázatának csökkentése és kezelése” című, 4. magyar antithromboticus irányelv felhívja a figyelmet a vénástrombózis-rizikó felmérésének szükségességére, és elsőként tartalmazza a kórházban fekvő belgyógyászati és sebészeti betegek kockázati kérdőívét. Ismertetjük a kockázatbecslő kérdőíveket és áttekintjük a kérdőívekben szereplő rizikófaktorokra vonatkozó bizonyítékokon alapuló adatokat.

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